21023310221210 has 64 divisors (see below), whose sum is σ = 43988908826880. Its totient is φ = 7149314565120.

The previous prime is 21023310221201. The next prime is 21023310221231. The reversal of 21023310221210 is 1212201332012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35510270 + ... + 36097449.

It is an arithmetic number, because the mean of its divisors is an integer number (687326700420).

Almost surely, 2^{21023310221210} is an apocalyptic number.

21023310221210 is an abundant number, since it is smaller than the sum of its proper divisors (22965598605670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023310221210 is a wasteful number, since it uses less digits than its factorization.

21023310221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71607911.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21023310221210 its reverse (1212201332012), we get a palindrome (22235511553222).

The spelling of 21023310221210 in words is "twenty-one trillion, twenty-three billion, three hundred ten million, two hundred twenty-one thousand, two hundred ten".